Much like Fedora Silverblue, Fedora Kinoite, and Fedora Sericea there's going to be a new immutable version of Fedora coming called Fedora Onyx.
These immutable versions of Fedora Linux work like SteamOS on Steam Deck, with the main system being the same across every installation, and it doesn't change. Upgrades are done over the whole thing, it's supposed to be faster and more stable and it's an increasingly popular way to use Linux.
More about it:
Fedora Onyx is an immutable desktop operating system, featuring the Budgie Desktop environment. Fedora Onyx leverages the same foundational technologies as other Fedora immutable variants such as Fedora Silverblue, Fedora Kinoite, and Fedora Sericea (flatpak, rpm-ostree, podman, toolbx). Fedora Onyx is built for people that are attracted to / find value in the Fedora computing platform and Budgie Desktop environment, but need the robust immutability and atomic capabilities that rpm-ostree provides, which are not be offered through traditional Fedora spins (e.g. Fedora Budgie Spin).